quick question re: fuel tank hose

[Forden]

About to reinstall rebuilt carbs--quick question about the vent hose that runs from the rear of the tank--where should it route after going through the clip on the left side airbox mount? There is a wire clip on either end, and I get that the one is used to attach the hose to the nipple on the tank, but not sure about the other end. I would've thought it just vented to the air, so not sure why there is a hose clip on it.

Thanks all!

[DiverRay]

The wire clip on the bottom does not belong on the hose. The hose goes through that clip, and in the frame you will see a welded wire on the swingarm boss. hose goes through that and stops about two inches below it. That hose drains water that get into the gas cap area of the Standard fuel tank.

[DiverRay]

Just thought of something else it may be! There is a vent hose for the middle drive that goes up under the seat/tank area. Open at the top, no clip, but clip at the bottom. Keeps water out of the middle drive so you MUST use it! My LG didn't have it when I first got it, and I almost lost the middle drive because of that.

[Forden]

Just thought of something else it may be! There is a vent hose for the middle drive that goes up under the seat/tank area. Open at the top, no clip, but clip at the bottom. Keeps water out of the middle drive so you MUST use it! My LG didn't have it when I first got it, and I almost lost the middle drive because of that.

Thanks Ray, that confirms my instinct. I fired the bike for the first time over the weekend, and she fired right up! Seems to be an oil control issue to resolve, primarily in #2, so more to do however...

[DiverRay]

Not sure how long it's been since running, but if you think it could be rings, pour a little B12 ChemTool into each plug hole and let it set for about 20 minutes. Turn the engine over a few times BEFORE putting plugs back in, then run it. Sometimes you need to run them for about 500 miles before they settle back in.

[Forden]

Not sure how long it's been since running, but if you think it could be rings, pour a little B12 ChemTool into each plug hole and let it set for about 20 minutes. Turn the engine over a few times BEFORE putting plugs back in, then run it. Sometimes you need to run them for about 500 miles before they settle back in.

Thanks. The rings are new, as are the valve stem seals, so valve guide may be most likely culprit, unfortunately. They seemed tight when I rocked them in the guides during reassembly. But this is my first full top end rebuild, so first time diagnosing under these circumstances.

[DiverRay]

If it's all new, you NEED to "break them in" before anything else!!! I always try to get the bike ready to ride, fire up and check engine for proper advance, etc. Then, when all set, get on an "open" road and in second gear go from 1,500 RPM to about 7,000 RPM and then drop the throttle to idle and let the bike go back down to 1,500. Repeat two times, then follow breakin procedure, IE keep below 3,500 for the first 200 miles, but don't hold a steady RPM for too long.

[LenB]

Had an issue with 'soft' intake valve guides way back @ about 10k km. Burned oil like crazy. Behind a Vetter/Yamaha firing w/lowers and holes in the muffler axle detents, I was getting gassed pretty bad. SWMBO says that may explain a few things. All re-done under warranty. Found cylinder wear while they were in there and bored it out one over. (wish I'd known about that - what's the problem removing a little more metal?) Hopefully your issue is not guides - not a small job.

[Forden]

If it's all new, you NEED to "break them in" before anything else!!! I always try to get the bike ready to ride, fire up and check engine for proper advance, etc. Then, when all set, get on an "open" road and in second gear go from 1,500 RPM to about 7,000 RPM and then drop the throttle to idle and let the bike go back down to 1,500. Repeat two times, then follow breakin procedure, IE keep below 3,500 for the first 200 miles, but don't hold a steady RPM for too long.

yes, well aware--many different opinions about break-in. Here's another reference for it, wonder what you all think of it:
https://www.ntnoa.org/enginebreakin.htm

[Forden]

Had an issue with 'soft' intake valve guides way back @ about 10k km. Burned oil like crazy. Behind a Vetter/Yamaha firing w/lowers and holes in the muffler axle detents, I was getting gassed pretty bad. SWMBO says that may explain a few things. All re-done under warranty. Found cylinder wear while they were in there and bored it out one over. (wish I'd known about that - what's the problem removing a little more metal?) Hopefully your issue is not guides - not a small job.

yes hoping I don't have to resort to a machine shop... but we'll see. cylinders measured within tolerances, but as I recall there was some visible wear on that #2 piston and bore. sigh. have to go back and check my notes.